Nonstop flight route between Fort Sill, Oklahoma, United States and Hanoi, Vietnam:

About this route:

A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Nội Bài International Airport (HAN), Hanoi, Vietnam would travel a Great Circle distance of 8,262 miles (or 13,297 kilometers).

A Great Circle is the shortest distance between 2 points on a sphere. Because most world maps are flat (but the Earth is round), the route of the shortest distance between 2 points on the Earth will often appear curved when viewed on a flat map, especially for long distances. If you were to simply draw a straight line on a flat map and measure a very long distance, it would likely be much further than if you were to lay a string between those two points on a globe. Because of the large distance between Henry Post Army Airfield and Nội Bài International Airport, the route shown on this map most likely appears curved because of this reason.

Try it at home! Get a globe and tightly lay a string between Henry Post Army Airfield and Nội Bài International Airport. You'll see that it will travel the same route of the red line on this map!

Departure Airport Information:

Arrival Airport Information:

Facts about Henry Post Army Airfield (FSI):

• There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
• The closest airport to Henry Post Army Airfield (FSI) is Lawton–Fort Sill Regional Airport (LAW), which is located only 6 miles (9 kilometers) S of FSI.
• Henry Post Army Airfield (FSI) currently has only 1 runway.
• The furthest airport from Henry Post Army Airfield (FSI) is Sir Gaëtan Duval Airport (RRG), which is located 10,920 miles (17,575 kilometers) away in Rodrigues Island, Mauritius.
• With the sudden end of World War I in November 1918, the future operational status of Post Field was unknown.
• The Fort Sill Army Radar Approach Control is the Army's Second busiest Air Traffic Control Facility, providing Radar Approach Control service to Henry Post Army Air Field, Lawton/Fort Sill Regional Airport, Duncan/Haliburton Airport and many smaller airports in the area.
• Post Field served as a base for flight training for the Air Service.
• In 1940 the Artillery decided that the Air Corps had outgrown such mundane chores as artillery spotting, and it was decided that it would take care of itself with its own observation aircraft.
• Henry Post AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.

Facts about Nội Bài International Airport (HAN):

• The furthest airport from Nội Bài International Airport (HAN) is Diego Aracena International Airport (IQQ), which is nearly antipodal to Nội Bài International Airport (meaning Nội Bài International Airport is almost on the exact opposite side of the Earth from Diego Aracena International Airport), and is located 12,174 miles (19,591 kilometers) away in Iquique, Chile.
• Nội Bài International Airport (HAN) has 2 runways.
• In addition to being known as "Nội Bài International Airport", another name for HAN is "Sân bay Quốc tế Nội Bài".
• Because of Nội Bài International Airport's relatively low elevation of 39 feet, planes can take off or land at Nội Bài International Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
• The distance between the two runways is only 250 metres, so the airport has a maximum capacity of 10 million passengers a year in accordance with International Civil Aviation Organisation safety regulations.
• As of December 2011, there was only one passenger terminal at Nội Bài Airport.
• Nội Bài International Airport in Hanoi, the capital of Vietnam, is the largest airport in the north of the country.
• The closest airport to Nội Bài International Airport (HAN) is Cat Bi International Airport (HPH), which is located 65 miles (105 kilometers) ESE of HAN.